[src/nick-nhusb]: src/sys/dev/usb Update comment.

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7abc9adf63e2
branches:  nick-nhusb
changeset: 334224:7abc9adf63e2
user:      skrll <skrll%NetBSD.org@localhost>
date:      Sun Jun 07 08:04:52 2015 +0000

description:
Update comment.

>From t-hash.

diffstat:

 sys/dev/usb/xhci.c |  11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diffs (35 lines):

diff -r 3bad5fcefc90 -r 7abc9adf63e2 sys/dev/usb/xhci.c
--- a/sys/dev/usb/xhci.c        Sun Jun 07 08:04:36 2015 +0000
+++ b/sys/dev/usb/xhci.c        Sun Jun 07 08:04:52 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: xhci.c,v 1.28.2.27 2015/05/28 06:15:47 skrll Exp $     */
+/*     $NetBSD: xhci.c,v 1.28.2.28 2015/06/07 08:04:52 skrll Exp $     */
 
 /*
  * Copyright (c) 2013 Jonathan A. Kollasch
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xhci.c,v 1.28.2.27 2015/05/28 06:15:47 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xhci.c,v 1.28.2.28 2015/06/07 08:04:52 skrll Exp $");
 
 #include "opt_usb.h"
 
@@ -1005,11 +1005,14 @@
  * port_status speed
  *     definition: UPS_*_SPEED in usb.h
  *     They are used in usb_port_status_t and valid only for USB 2.0.
- *     Speed value is 0 for Super Speed or more.
+ *     Speed value is always 0 for Super Speed or more, and dwExtPortStatus
+ *     of usb_port_status_ext_t indicates port speed.
  *     Note that some 3.0 values overlap with 2.0 values.
  *     (e.g. 0x200 means UPS_POER_POWER_SS in SS and
  *                 means UPS_LOW_SPEED in HS.)
- *     port status sent from hub also uses these values.
+ *     port status returned from hub also uses these values.
+ *     On NetBSD UPS_OTHER_SPEED indicates port speed is super speed
+ *     or more.
  * xspeed:
  *     definition: Protocol Speed ID (PSI) (xHCI 1.1 7.2.1)
  *     They are used in only slot context and PORTSC reg of xhci.